Help Support RocketryForum by donating using the link above or becoming a Supporting Member.


Page 1 of 2 1 2 LastLast
Results 1 to 30 of 35
  1. #1
    Join Date
    2nd January 2013
    Posts
    208

    Fried my Eggfinder transmitter.

    Finally got some batteries for it. Got a little to anxious and hooked up the battery backwards. Needless to say, Ill have to get another one. I didnt even get to use it. Live and learn lol.


  2. #2
    Join Date
    15th May 2016
    Posts
    1,984

    David McCann
    Dave's Rockets | My Flights
    URRG |URRF 4| Level 2 | TRA# 14210

  3. #3
    Join Date
    11th January 2012
    Location
    Commonwealth of VA
    Posts
    1,525
    Quote Originally Posted by ascastil View Post
    Finally got some batteries for it. Got a little to anxious and hooked up the battery backwards. Needless to say, Ill have to get another one. I didnt even get to use it. Live and learn lol.
    Are you sure you fried it?
    Talk to Cris - there may only be a couple of components that need to be replaced.

    Note these comments from the instructions:
    "Solder the leads of your battery connector to the two pads marked “BATT”. Because of the
    bridge rectifier between the battery and the regulator, the polarity doesn’t matter. You cannot
    connect the battery backwards; it will work exactly the same either way."
    Last edited by Worsaer; 18th June 2017 at 07:15 PM.

    -Bill Riley

    TRA: 12294
    NAR: 89196

    A good rule for rocket experimenters to follow is this: always assume that it will explode.
    — Astronautics, issue 38, October 1937.


  4. #4
    Join Date
    2nd January 2013
    Posts
    208
    hmmm, i dont know then. The chip got hot and smelled burnt? The red light turned on for a second, turned off, and I could smell something burned.

  5. #5
    Join Date
    13th June 2014
    Location
    Cocoa Beach, FL
    Posts
    3,443
    i did the same with a Quark. Cris sent me a few components he thought were faulty but it was toast!
    Tim
    L3 NAR 98225

  6. #6
    Join Date
    11th January 2013
    Location
    Old Bridge,,,,,,,,,,,,, New Jersey
    Posts
    5,039
    Quote Originally Posted by Worsaer View Post
    Are you sure you fried it?
    Talk to Cris - there may only be a couple of components that need to be replaced.

    Note these comments from the instructions:
    "Solder the leads of your battery connector to the two pads marked “BATT”. Because of the
    bridge rectifier between the battery and the regulator, the polarity doesn’t matter. You cannot
    connect the battery backwards; it will work exactly the same either way."
    +1...
    Email Cris..
    See what he says..
    Let him say it's totaled..

    Teddy




    www.Onebadhawk.com

    Ted Chernok
    Old Bridge New Jersey
    METRA- BoD- New York..
    URRG- Way upstate New York..
    MDRA- Maryland..
    QCRS- Illinois- Best politicians money can buy ( Tim L. )..
    Kloudbusters- Kansas..
    NAR # 87063
    Tripoli # 14443
    Level 3

  7. #7
    Join Date
    2nd January 2013
    Posts
    208
    Ok back at getting around to this eggfinder. A 2s 7.4v battery with minimum 250ma is recommended. Can you put to big a battery in it? I put a 2s 7.4v 800 ma battery in it. Too big or does that not matter?

  8. #8
    Join Date
    2nd January 2013
    Posts
    208
    Cris said polarity doesnt matter. You cant hook the battery up backwards.

  9. #9
    Join Date
    11th January 2013
    Location
    Old Bridge,,,,,,,,,,,,, New Jersey
    Posts
    5,039
    Quote Originally Posted by ascastil View Post
    Ok back at getting around to this eggfinder. A 2s 7.4v battery with minimum 250ma is recommended. Can you put to big a battery in it? I put a 2s 7.4v 800 ma battery in it. Too big or does that not matter?
    It'll run 3 times longer.....
    I use oversize mah batts too..
    Good for many flights...

    Teddy




    www.Onebadhawk.com

    Ted Chernok
    Old Bridge New Jersey
    METRA- BoD- New York..
    URRG- Way upstate New York..
    MDRA- Maryland..
    QCRS- Illinois- Best politicians money can buy ( Tim L. )..
    Kloudbusters- Kansas..
    NAR # 87063
    Tripoli # 14443
    Level 3

  10. #10
    Join Date
    2nd January 2013
    Posts
    208
    OOOPs, I did it again....??

  11. #11
    Join Date
    2nd January 2013
    Posts
    208
    Ok, this thread is to figure out what I did, what I am doing. At this point, Im lost and really dont care. I bought a Turnigy battery charger to charge the Turnigy 7.4v battery. I also bought a battery tester to check voltage on my new battery. Plug it in to my new eggfinder and same thing, got so hot I couldnt hold it and smelled like fried computer ****. At this point, Im laughing it off I guess. It seems so simple. Pooooof, done. Im sad, Im laughing, F it.

    Edit. Even matched the polarity on the battery terms.

  12. #12
    Join Date
    2nd January 2013
    Posts
    208
    Holy ****. Is it the 3 lead wire that goes into the tx, or the 2 lead pos and neg? Ive been using the 3 lead wire. I hope thats my mistake. 3rd times a charm.

  13. #13
    Join Date
    24th August 2013
    Posts
    530
    The two lead puts out the same voltage as using the two outer connectors on the three lead.

  14. #14
    Join Date
    23rd January 2015
    Location
    Draper, UT
    Posts
    71
    Ah, you've hooking up to the balance charging plug instead of the output leads. The three wire connector is ONLY used when charging with a balancing battery charger to get both cells fully charged. The other one is used for actually powering devices.
    Let us create vessels and sails adapted to the heavenly ether, and there will be those who will not shrink from even that vast expanse. - Kepler to Galileo in 1610

    NAR 86500
    Level 2

  15. #15
    Join Date
    24th August 2013
    Posts
    530
    It is correct that you want to use the two lead to power devices, but using the three is not going to fry the unit.

  16. #16
    Join Date
    22nd February 2013
    Location
    Garland, TX
    Posts
    3,586
    Are you using the three male pin programming part on the TX to power it through the 3 pin female balance plug on the battery? That would definitely be a problem.
    Last edited by Cl(VII); 18th August 2017 at 09:01 PM.
    So much of my rocket building time has been diverted toward my "other hobby": Race Timing

  17. #17
    Join Date
    24th April 2010
    Location
    Wisconsin
    Posts
    1,639
    I fried My first Egg- kit. I also learned a lot from the experience. Just a couple of notes here -

    1) Those egg instructions are some of the best written instructions around. For the best result, you should always read the instructions once or twice first. Don't begin building until you have a solid grasp of what you are doing.

    2) Work slowly, and inspect your work closely (with a 10x magnifier) to be sure it's right, before you go to the next step. Patience is required.

    3) When you power it up, and you see smoke, or it gets hot, or it does not work. It can almost always be fixed !.

    ADDITIONAL NOTES:
    - Search YouTube for Soldering Skill videos. Practice soldering kits can be purchased on Ebay. If you don't know what your soldering skills are, do some practice soldering first.
    - Chris usually offers an "oops" discount - if you want to purchase a second kit.
    - Almost EVERY COMPONENT on the board can be replaced at very little cost. Purchase replacement parts from Mouser.com.

    I fried my first Eggfinder, and got a second one from Chris. I was more careful with the second one, and it works perfectly. ** Then I bought all the replacement parts (including the GPS chip) from Mouser and re-built the "fried" Eggfinder, Now I have two working TX units. The only thing I didn't replace was the radio (rf) board.
    -Scott Sager
    NAR 91621 L2
    TRA 15982 L2
    Woosh #558
    KC9WQK

  18. #18
    Join Date
    2nd January 2013
    Posts
    208
    Quote Originally Posted by Cl(VII) View Post
    Are you using the three male pin programming part on the TX to power it through the 3 pin female balance plug on the battery? That would definitely be a problem.
    Yes.
    Damnit.

  19. #19
    Join Date
    2nd January 2013
    Posts
    208
    Quote Originally Posted by scsager View Post
    I fried My first Egg- kit. I also learned a lot from the experience. Just a couple of notes here -

    1) Those egg instructions are some of the best written instructions around. For the best result, you should always read the instructions once or twice first. Don't begin building until you have a solid grasp of what you are doing.

    2) Work slowly, and inspect your work closely (with a 10x magnifier) to be sure it's right, before you go to the next step. Patience is required.

    3) When you power it up, and you see smoke, or it gets hot, or it does not work. It can almost always be fixed !.

    ADDITIONAL NOTES:
    - Search YouTube for Soldering Skill videos. Practice soldering kits can be purchased on Ebay. If you don't know what your soldering skills are, do some practice soldering first.
    - Chris usually offers an "oops" discount - if you want to purchase a second kit.
    - Almost EVERY COMPONENT on the board can be replaced at very little cost. Purchase replacement parts from Mouser.com.

    I fried my first Eggfinder, and got a second one from Chris. I was more careful with the second one, and it works perfectly. ** Then I bought all the replacement parts (including the GPS chip) from Mouser and re-built the "fried" Eggfinder, Now I have two working TX units. The only thing I didn't replace was the radio (rf) board.
    I had it assmebled for me. EXCELLENT WORK.

  20. #20
    Join Date
    2nd January 2013
    Posts
    208
    I feel so stupid. I had a drone with a little camera that used..........Damnit!!!! It used the 2 pos and neg for the battery. I feel like an idiot. Im 41, got all the proper tools recommended by the forum, battery, charger, tester, have a fresh unit built and fry it again. I can install a supercharger on my Corvette, I cant hook up a gps battery for a rocket, wtf!!!!!!!!!

  21. #21
    Join Date
    29th May 2015
    Location
    Keller, Texas
    Posts
    583
    Jeff Jones

    TRA 04736
    NAR 75968
    L3 KF5YYI




  22. #22
    Join Date
    3rd February 2012
    Location
    So Cal (ROC, TRASD, SCRA)
    Posts
    2,508
    The 3-pin header is NOT for connecting a battery, it's for programming the frequency. The power input goes directly to the circuitry, it's designed for a 3.3V regulated input like you'd get from the matching connector on the Eggfinder LCD receiver (which you use for programming it). If you connect a 2S LiPo battery to it, you will instantly and irreversibly damage both the GPS and the RF modules. The battery inputs are polarity-protected so you can't mess those up.

  23. #23
    Join Date
    26th November 2009
    Posts
    4,592
    Oh my gosh, someone connected a battery up to the header? Ooooops. Weeeeeelllll, toss it in the junk drawer in case one needs a component or two off the
    dorked board.

    Stuff happens when assembling kits. It's worse when it's a $400.00 or more amplifier or such. I had a Ham radio amplifier the size of a brick that
    would put out close to 100 watts on the 80 meter band with 5 watts in and about 60 watts on 10 meters. I had to feed it with a 36V 10 amp power supply
    and it would not tolerate a mis-matched antenna. The two IRF510 power transistors would eventually give up the ghost as the automatic antenna tuner wasn't
    fast enough to make the match. Yes, I did the tune-up with 5 watts with the amp bypassed but when the full power output was asked of it, the tuner would
    have to "tweak" the match and that stressed the IRF510's. Fortunately, they were 79 cents each and I could replace them and setup the amp again in about
    an hour. After 3 years something else on the board went and that was it.
    Was fun getting so much power out of a little brick but invested in a 12V amp with proper foldback circuits so's to protect itself from mis-match.

    Bottom line is the pricier the kit the more it hurts if one can't get it going. The EF kits are reasonable and doesn't hurt as bad if something adverse happens.
    I've messed up my share . Some I salvaged, some I wrote off. Kurt

  24. #24
    Join Date
    19th June 2017
    Location
    Vacaville, CA
    Posts
    155
    I toasted mine last night as well. Accidentally touched the header mount pad with 7.4 volts. Paying my OOPS invoice now.....
    Eric Hamilton, NAR, TRA
    SARG, LUNAR
    Level 1, April 2017, Estes Argent, H115DM
    Level 2, September 2017, Scratchbuilt 2.6", J270G

  25. #25
    Join Date
    11th January 2012
    Location
    Commonwealth of VA
    Posts
    1,525
    Yep, once the Magic Smoke escapes, it's all over.

    -Bill Riley

    TRA: 12294
    NAR: 89196

    A good rule for rocket experimenters to follow is this: always assume that it will explode.
    — Astronautics, issue 38, October 1937.


  26. #26
    Join Date
    19th June 2017
    Location
    Vacaville, CA
    Posts
    155
    Mine didn't smoke, get hot or smell like electronics burning. Power touched the wrong spot for one second, while I was looking for the LED flash. but no light. Leasing learned.
    Eric Hamilton, NAR, TRA
    SARG, LUNAR
    Level 1, April 2017, Estes Argent, H115DM
    Level 2, September 2017, Scratchbuilt 2.6", J270G

  27. #27
    Join Date
    26th November 2009
    Posts
    4,592
    Yeah, I once connected up a 9-volt battery backwards to one of those cheap 3 transistor FM transmitters. A 25 uf capacitor blew off in my face. It actually exploded like a large firecracker. The weird thing there was I just replaced the capacitor and the thing worked again! Kurt

  28. #28
    Join Date
    2nd January 2013
    Posts
    208
    Ok. I had Connor assemble it so Ill admit I didnt really read the instructions. Just saw the 3 prong connector and figured thats where the battery goes. Does the battery pigtail get soldered to the 2 holes under that 3 pin connector?

    If the battery pigtail does get soldered there, it looks like on the bottom side of those 2 holes there is already something soldered near the + hole. Is it ok to have the battery pigtail sharing that hole?

  29. #29
    Join Date
    19th June 2017
    Location
    Vacaville, CA
    Posts
    155
    yes. you solder to those two holes. And the + hole does connect to that diode. the hole was plugged while the diode was soldered to keep it clean.

    I did an "Eggfinder mini build" post a few days ago. the pictures in post #2 shows that connection well.

    http://www.rocketryforum.com/showthr...der-Mini-build
    Last edited by Eric; 20th August 2017 at 05:32 AM. Reason: added link
    Eric Hamilton, NAR, TRA
    SARG, LUNAR
    Level 1, April 2017, Estes Argent, H115DM
    Level 2, September 2017, Scratchbuilt 2.6", J270G

  30. #30
    Join Date
    2nd January 2013
    Posts
    208
    Im afraid to even attempt it. There just looks like theres a few places where the solder could run into another solder on the top and bottom of the board.


Similar Threads

  1. [SOLD!] New Eggfinder GPS Transmitter / LCD Receiver Combo in Deluxe case
    By Worsaer in forum Yard Sale / Wanted
    Replies: 15
    Last Post: 3rd March 2017, 07:55 PM
  2. This idiot just fried his TAC-1 chute!
    By glenbo in forum Recovery
    Replies: 18
    Last Post: 2nd July 2012, 05:29 AM
  3. Fried Cow Brain Sandwich
    By Darian Rachal in forum The Watering Hole
    Replies: 17
    Last Post: 13th July 2008, 02:38 AM
  4. Fried My Last Thin Mil Mylar Chute
    By roy_lappalainen in forum Recovery
    Replies: 5
    Last Post: 25th April 2007, 11:56 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •